The city is an architectural gem, full of history, and it is still in perfect condition. Its flagship is the Ducal Palace, a work commissioned by the Duke Federico da Montefeltro, illuminated by the most important architects of the era, such as Luciano Laurana, who articulated the whole building with the beautiful and unique facade of two towers, the Torricini. Baldassare Castiglione called it "the city palace", praising the splendor of this city that was the home of the most important minds of the Renaissance.